Fabric for aircraft industry

FIELD: fabric used in aircraft industry for manufacture of wing and tail covering of plane.

SUBSTANCE: fabric is produced from warp and weft polyester complex filaments having similar linear density ranging between 27.7-29.4 tex and twist rate of 130-160 twists/min. Warp to weft filament ratio of fabric is 55-50:45-50. Fabric is produced by twill weave and is not subjected to final finishing procedure.

EFFECT: provision for stretching of covering owing to thermal shrinkage of proposed fabric structure, reduced weight, and prolonged service life of fabric.

3 cl, 1 tbl, 7 ex

 

The invention relates to the technical fabrics and can be used in the aviation industry, in particular for the manufacture of the skin of the wings and tail surfaces of the aircraft.

The closest analogue of the inventive fabric is the fabric for the aviation industry, which is produced from cotton woven yarn plain weave (GOST 14619-69 cotton Fabrics for technical aviation industry).

However, this fabric does not have a high tensile strength and tear, easily destroyed when exposed to moisture, heat, etc. in Addition, in the manufacture and repair of aircraft sail tension of the cotton fabric is carried out by repeated impregnation varnish SC-551 with the subsequent application of a paint coating, which significantly lengthens the process of tensioning the skin, increases its weight and poor working conditions.

Before impregnation varnish cotton fabric must be pre-finished, that is to conduct rasshifrovka and degumming with a view to making it wettability and capillarity.

Technical result achieved in the inventive fabric:

- sail tension is due to the shrinking of the proposed structure of the tissue, reduces the process of plating, reducing weight;

- extension of the term of service the tissue due to the increased resistance to mechanical and physico-chemical effects.

- normalization of the technological process of manufacturing of the skin by eliminating the harmful working conditions, increased production, reduced zagryaznennosti atmosphere;

- reduction of fuel consumption due to the overall weight of the aircraft structure.

To achieve this result, the fabric is a twill weave of the main and weft threads, which represents a polyester multifilament yarn with a twist of 130-160 cu/m of the same linear density in the range of 27.7-29.4 Tex. The ratio of main and weft threads in the fabric is 55-50:45-50.

In the tissue of the maximum tensile strength and tear with a minimum surface density.

According to the invention the cloth covering is used in severe forms without final finishing and without multiple impregnation varnish SC-551. The tension of the fabric is due to shrinkage when heated in the manufacture and repair of aircraft.

The invention is illustrated by the following examples.

Example 1

The fabric is produced in a twill weave of polyester filament yarn with a linear density of 29.4 Tex with a twist of 160 cu/m without the final finish. The ratio of warp and weft threads in the fabric is 50:50.

Example 2

The fabric is produced in a twill weave polyester complex Italiano density 28.3 Tex with a twist of 140 kr/m without the final finish. The ratio of warp and weft threads in the fabric is 57:43.

Example 3

The fabric is produced in a twill weave of polyester filament yarn with a linear density of 27.7 Tex with a twist of 130 kr/m without final finishing, the ratio of warp and weft threads in the fabric is 55:45.

Example 4 (similar)

The fabric is produced of plain equilateral weave of cotton yarns combed with a nominal linear density on the basis of 10 Tex × 2, and duck 10 Tex × 2. The fabric after generation undergoes the process of rasshifrovka and otwarcie.

Example 5 (comparative)

The fabric is produced of plain weave of polyester filament yarn with a linear density of 28.3 Tex with a twist of 140 kr/m without final finishing, the ratio of warp and weft threads in the fabric is 57:43.

Example 6 (comparative)

The fabric is produced in a twill weave of polyester filament yarn with a linear density of 24.5 Tex with a twist of 120 cu/m without the final finish. The ratio of warp and weft threads in the fabric is 45:55.

Example 7 (comparative)

The fabric is produced in a twill weave of polyester filament yarn with a linear density of 32 Tex twist 170 cu/m without final finishing, the ratio of warp and weft threads in the fabric of 60:40.

These tables show that redlagaemaya fabric significantly outperforms the closest analogue in the physical-mechanical characteristics, such as explosive and heartbreaking load, and also has a higher shrinkage properties, this fabric not subjected to additional finishing.

Table
ExampleSurface density, g/m2The breaking load of the fabric strips (50×200) mm kgTearing load strips of fabric (50×200) mm kgShrinkage, %
baseducksbaseducksbaseducks
114513814020,016,47,88,0
213012012016,517,47,07,6
312513813221,0of 17.58,48,0
42209090a 3.9the 4.72,72,3
513013012011,012,8a 4.94,6
611511011010,511,56,05,6
716013715010,911,76,56,0

1. The fabric for the aviation industry, made two major systems and weft threads, characterized in that the main and weft yarns are polyester multifilament yarn of the same linear density in the range of 27.7-29.4 Tex with a twist of 130-160 cu/m, the ratio of main and weft threads in the fabric is 55-50:45-50.

2. The fabric according to claim 1, characterized in that the fabric belongs to the pile.

3. The fabric according to claim 1 or 2, characterized in that the fabric is not subjected to final finish.



 

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